condition mean min max ZT0-3 10.303135 10.303135 10.303135 ZT4-7 10.242658500000001 10.242658500000001 10.242658500000001 ZT8-11 10.564862 10.564862 10.564862 ZT12-15 10.2772675 10.2772675 10.2772675 ZT16-19 9.0851135 9.0851135 9.0851135 ZT20-23 9.170481 9.170481 9.170481